diff --git a/client/src/pages/InvoicesBAP.tsx b/client/src/pages/InvoicesBAP.tsx
index d6c2321..221b90b 100644
--- a/client/src/pages/InvoicesBAP.tsx
+++ b/client/src/pages/InvoicesBAP.tsx
@@ -1,4 +1,4 @@
-import { useState } from "react";
+import React, { useState } from "react";
 import DashboardLayout from "@/components/DashboardLayout";
 import { Card, CardContent } from "@/components/ui/card";
 import { Button } from "@/components/ui/button";
@@ -32,7 +32,7 @@ import {
   TableRow,
 } from "@/components/ui/table";
 import { trpc } from "@/lib/trpc";
-import { Search, FileText, Download, FileSpreadsheet, Trash2, Edit, Trash, CheckCircle, CheckCircle2, ShieldCheck, RefreshCw, FolderDown } from "lucide-react";
+import { Search, FileText, Download, FileSpreadsheet, Trash2, Edit, Trash, CheckCircle, CheckCircle2, ShieldCheck, RefreshCw, FolderDown, ChevronDown, ChevronRight, ChevronsUpDown } from "lucide-react";
 
 // Helper : télécharge un ZIP de plusieurs PDFs annotés BAP
 async function downloadBapZip(
@@ -121,6 +121,28 @@ export default function InvoicesBAP() {
   const [textDialogOpen, setTextDialogOpen] = useState(false);
   const [selectedInvoiceText, setSelectedInvoiceText] = useState<string | null>(null);
   const [isZipDownloading, setIsZipDownloading] = useState(false);
+  // Accordéon : lignes dépliées
+  const [expandedIds, setExpandedIds] = useState<Set<number>>(new Set());
+  const [allExpanded, setAllExpanded] = useState(false);
+
+  const toggleRow = (id: number) => {
+    setExpandedIds(prev => {
+      const next = new Set(prev);
+      if (next.has(id)) next.delete(id);
+      else next.add(id);
+      return next;
+    });
+  };
+
+  const toggleAllRows = () => {
+    if (allExpanded) {
+      setExpandedIds(new Set());
+      setAllExpanded(false);
+    } else {
+      setExpandedIds(new Set((filteredInvoices || []).map(inv => inv.id)));
+      setAllExpanded(true);
+    }
+  };
   const { data: allInvoices, isLoading } = trpc.invoices.list.useQuery();
   // Filter for BAP invoices only (Abonnement = NON, isSubscription = 0)
   const invoices = allInvoices?.filter(inv => inv.isSubscription === 0);
@@ -653,7 +675,17 @@ export default function InvoicesBAP() {
                 <Table>
                   <TableHeader>
                     <TableRow>
-                      <TableHead className="w-12">
+                      <TableHead className="w-8">
+                        {/* Bouton global +/- */}
+                        <button
+                          onClick={toggleAllRows}
+                          className="flex items-center justify-center w-6 h-6 rounded border border-gray-300 bg-gray-50 hover:bg-gray-100 text-gray-600"
+                          title={allExpanded ? "Replier toutes les lignes" : "Déplier toutes les lignes"}
+                        >
+                          <ChevronsUpDown className="w-3 h-3" />
+                        </button>
+                      </TableHead>
+                      <TableHead className="w-10">
                         <Checkbox
                           checked={allEligibleSelected}
                           onCheckedChange={handleSelectAll}
@@ -664,23 +696,31 @@ export default function InvoicesBAP() {
                       <TableHead>N° Facture</TableHead>
                       <TableHead>Date</TableHead>
                       <TableHead>Montant</TableHead>
-                      <TableHead>Service</TableHead>
-                      <TableHead>Type achat</TableHead>
-                      <TableHead>Ventilation</TableHead>
                       <TableHead>Score</TableHead>
                       <TableHead>Statut</TableHead>
-                      <TableHead className="w-32">Actions</TableHead>
+                      <TableHead className="w-36">Actions</TableHead>
                     </TableRow>
                   </TableHeader>
                   <TableBody>
                     {filteredInvoices.map((invoice) => {
+                      const isExpanded = expandedIds.has(invoice.id);
                       return (
-                        <TableRow key={invoice.id}>
+                        <React.Fragment key={invoice.id}>
+                        <TableRow className="hover:bg-gray-50">
+                          {/* Bouton +/- individuel */}
+                          <TableCell className="p-1">
+                            <button
+                              onClick={() => toggleRow(invoice.id)}
+                              className="flex items-center justify-center w-6 h-6 rounded border border-gray-300 bg-white hover:bg-gray-100 text-gray-500"
+                              title={isExpanded ? "Replier" : "Déplier"}
+                            >
+                              {isExpanded ? <ChevronDown className="w-3 h-3" /> : <ChevronRight className="w-3 h-3" />}
+                            </button>
+                          </TableCell>
                           <TableCell>
                             <Checkbox
                               checked={selectedIds.includes(invoice.id)}
                               onCheckedChange={(checked) => handleSelectOne(invoice.id, checked as boolean)}
-
                             />
                           </TableCell>
                           <TableCell className="font-medium">
@@ -702,120 +742,6 @@ export default function InvoicesBAP() {
                               ? `${parseFloat(invoice.totalAmount as string).toFixed(2)} €`
                               : "-"}
                           </TableCell>
-                          <TableCell className="text-sm">
-                            <select
-                              value={invoice.serviceConcerne || ""}
-                              onChange={(e) => {
-                                if (e.target.value === "__ADD_NEW__") {
-                                  setPendingInvoiceId(invoice.id);
-                                  setAddDialogType("service");
-                                  setAddDialogOpen(true);
-                                  e.target.value = invoice.serviceConcerne || "";
-                                } else {
-                                  // Remove field from autoFilledFields when manually edited
-                                  const autoFilledFields = invoice.autoFilledFields ? JSON.parse(invoice.autoFilledFields) : [];
-                                  const updatedAutoFields = autoFilledFields.filter((f: string) => f !== "serviceConcerne");
-                                  const newVal = e.target.value || undefined;
-                                  // Apprentissage : mémoriser la correction manuelle
-                                  if (invoice.supplierName && newVal !== (invoice.serviceConcerne || undefined)) {
-                                    upsertLearningMutation.mutate({
-                                      supplierName: invoice.supplierName,
-                                      fieldName: 'serviceConcerne',
-                                      originalValue: invoice.serviceConcerne || undefined,
-                                      correctedValue: newVal || '',
-                                    });
-                                  }
-                                  updateFieldMutation.mutate({
-                                    id: invoice.id,
-                                    data: { 
-                                      serviceConcerne: newVal,
-                                      autoFilledFields: updatedAutoFields.length > 0 ? JSON.stringify(updatedAutoFields) : null
-                                    },
-                                  });
-                                }
-                              }}
-                              className={`w-full px-2 py-1 border rounded text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${getFieldColor(invoice, "serviceConcerne")}`}
-                            >
-                              <option value="">-</option>
-                              {departments?.map((dept) => (
-                                <option key={dept.id} value={dept.name}>{dept.name}</option>
-                              ))}
-                              <option value="__ADD_NEW__" className="font-semibold text-blue-600">➜ Ajouter...</option>
-                            </select>
-                          </TableCell>
-                          <TableCell className="text-sm">
-                            <select
-                              value={invoice.typeAchat || ""}
-                              onChange={(e) => {
-                                // Remove field from autoFilledFields when manually edited
-                                const autoFilledFields = invoice.autoFilledFields ? JSON.parse(invoice.autoFilledFields) : [];
-                                const updatedAutoFields = autoFilledFields.filter((f: string) => f !== "typeAchat");
-                                const newTypeAchat = e.target.value as "CAPEX" | "OPEX" | undefined;
-                                // Apprentissage : mémoriser la correction manuelle
-                                if (invoice.supplierName && newTypeAchat !== (invoice.typeAchat || undefined)) {
-                                  upsertLearningMutation.mutate({
-                                    supplierName: invoice.supplierName,
-                                    fieldName: 'typeAchat',
-                                    originalValue: invoice.typeAchat || undefined,
-                                    correctedValue: newTypeAchat || '',
-                                  });
-                                }
-                                updateFieldMutation.mutate({
-                                  id: invoice.id,
-                                  data: { 
-                                    typeAchat: newTypeAchat,
-                                    autoFilledFields: updatedAutoFields.length > 0 ? JSON.stringify(updatedAutoFields) : null
-                                  },
-                                });
-                              }}
-                              className={`w-full px-2 py-1 border rounded text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${getFieldColor(invoice, "typeAchat")}`}
-                            >
-                              <option value="">-</option>
-                              <option value="CAPEX">CAPEX</option>
-                              <option value="OPEX">OPEX</option>
-                            </select>
-                          </TableCell>
-                          <TableCell className="text-sm">
-                            <select
-                              value={invoice.ventilationComptable || ""}
-                              onChange={(e) => {
-                                if (e.target.value === "__ADD_NEW__") {
-                                  setPendingInvoiceId(invoice.id);
-                                  setAddDialogType("ventilation");
-                                  setAddDialogOpen(true);
-                                  e.target.value = invoice.ventilationComptable || "";
-                                } else {
-                                  // Remove field from autoFilledFields when manually edited
-                                  const autoFilledFields = invoice.autoFilledFields ? JSON.parse(invoice.autoFilledFields) : [];
-                                  const updatedAutoFields = autoFilledFields.filter((f: string) => f !== "ventilationComptable");
-                                  const newVentil = e.target.value || undefined;
-                                  // Apprentissage : mémoriser la correction manuelle
-                                  if (invoice.supplierName && newVentil !== (invoice.ventilationComptable || undefined)) {
-                                    upsertLearningMutation.mutate({
-                                      supplierName: invoice.supplierName,
-                                      fieldName: 'ventilationComptable',
-                                      originalValue: invoice.ventilationComptable || undefined,
-                                      correctedValue: newVentil || '',
-                                    });
-                                  }
-                                  updateFieldMutation.mutate({
-                                    id: invoice.id,
-                                    data: { 
-                                      ventilationComptable: newVentil,
-                                      autoFilledFields: updatedAutoFields.length > 0 ? JSON.stringify(updatedAutoFields) : null
-                                    },
-                                  });
-                                }
-                              }}
-                              className={`w-full px-2 py-1 border rounded text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${getFieldColor(invoice, "ventilationComptable")}`}
-                            >
-                              <option value="">-</option>
-                              {allocations?.map((alloc) => (
-                                <option key={alloc.id} value={alloc.name}>{alloc.name}</option>
-                              ))}
-                              <option value="__ADD_NEW__" className="font-semibold text-blue-600">➜ Ajouter...</option>
-                            </select>
-                          </TableCell>
                           <TableCell>
                             <div className="flex items-center gap-2">
                               {getQualityBadge(invoice.qualityScore)}
@@ -913,6 +839,98 @@ export default function InvoicesBAP() {
                             </div>
                           </TableCell>
                         </TableRow>
+                        {/* Ligne 2 : détails dépliables (Service, Type achat, Ventilation) */}
+                        {isExpanded && (
+                          <TableRow key={`${invoice.id}-details`} className="bg-blue-50/40 border-t-0">
+                            {/* col +/- vide */}
+                            <TableCell className="p-1" />
+                            {/* col checkbox vide */}
+                            <TableCell />
+                            {/* colspan 6 pour les 3 champs */}
+                            <TableCell colSpan={6} className="py-2 px-4">
+                              <div className="flex flex-wrap gap-4 items-center">
+                                {/* Service */}
+                                <div className="flex items-center gap-2 min-w-[200px]">
+                                  <span className="text-xs font-medium text-gray-500 whitespace-nowrap">Service :</span>
+                                  <select
+                                    value={invoice.serviceConcerne || ""}
+                                    onChange={(e) => {
+                                      if (e.target.value === "__ADD_NEW__") {
+                                        setPendingInvoiceId(invoice.id);
+                                        setAddDialogType("service");
+                                        setAddDialogOpen(true);
+                                        e.target.value = invoice.serviceConcerne || "";
+                                      } else {
+                                        const autoFilledFields = invoice.autoFilledFields ? JSON.parse(invoice.autoFilledFields) : [];
+                                        const updatedAutoFields = autoFilledFields.filter((f: string) => f !== "serviceConcerne");
+                                        const newVal = e.target.value || undefined;
+                                        if (invoice.supplierName && newVal !== (invoice.serviceConcerne || undefined)) {
+                                          upsertLearningMutation.mutate({ supplierName: invoice.supplierName, fieldName: 'serviceConcerne', originalValue: invoice.serviceConcerne || undefined, correctedValue: newVal || '' });
+                                        }
+                                        updateFieldMutation.mutate({ id: invoice.id, data: { serviceConcerne: newVal, autoFilledFields: updatedAutoFields.length > 0 ? JSON.stringify(updatedAutoFields) : null } });
+                                      }
+                                    }}
+                                    className={`flex-1 px-2 py-1 border rounded text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${getFieldColor(invoice, "serviceConcerne")}`}
+                                  >
+                                    <option value="">-</option>
+                                    {departments?.map((dept) => (<option key={dept.id} value={dept.name}>{dept.name}</option>))}
+                                    <option value="__ADD_NEW__" className="font-semibold text-blue-600">➜ Ajouter...</option>
+                                  </select>
+                                </div>
+                                {/* Type achat */}
+                                <div className="flex items-center gap-2 min-w-[160px]">
+                                  <span className="text-xs font-medium text-gray-500 whitespace-nowrap">Type achat :</span>
+                                  <select
+                                    value={invoice.typeAchat || ""}
+                                    onChange={(e) => {
+                                      const autoFilledFields = invoice.autoFilledFields ? JSON.parse(invoice.autoFilledFields) : [];
+                                      const updatedAutoFields = autoFilledFields.filter((f: string) => f !== "typeAchat");
+                                      const newTypeAchat = e.target.value as "CAPEX" | "OPEX" | undefined;
+                                      if (invoice.supplierName && newTypeAchat !== (invoice.typeAchat || undefined)) {
+                                        upsertLearningMutation.mutate({ supplierName: invoice.supplierName, fieldName: 'typeAchat', originalValue: invoice.typeAchat || undefined, correctedValue: newTypeAchat || '' });
+                                      }
+                                      updateFieldMutation.mutate({ id: invoice.id, data: { typeAchat: newTypeAchat, autoFilledFields: updatedAutoFields.length > 0 ? JSON.stringify(updatedAutoFields) : null } });
+                                    }}
+                                    className={`flex-1 px-2 py-1 border rounded text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${getFieldColor(invoice, "typeAchat")}`}
+                                  >
+                                    <option value="">-</option>
+                                    <option value="CAPEX">CAPEX</option>
+                                    <option value="OPEX">OPEX</option>
+                                  </select>
+                                </div>
+                                {/* Ventilation */}
+                                <div className="flex items-center gap-2 min-w-[220px]">
+                                  <span className="text-xs font-medium text-gray-500 whitespace-nowrap">Ventilation :</span>
+                                  <select
+                                    value={invoice.ventilationComptable || ""}
+                                    onChange={(e) => {
+                                      if (e.target.value === "__ADD_NEW__") {
+                                        setPendingInvoiceId(invoice.id);
+                                        setAddDialogType("ventilation");
+                                        setAddDialogOpen(true);
+                                        e.target.value = invoice.ventilationComptable || "";
+                                      } else {
+                                        const autoFilledFields = invoice.autoFilledFields ? JSON.parse(invoice.autoFilledFields) : [];
+                                        const updatedAutoFields = autoFilledFields.filter((f: string) => f !== "ventilationComptable");
+                                        const newVentil = e.target.value || undefined;
+                                        if (invoice.supplierName && newVentil !== (invoice.ventilationComptable || undefined)) {
+                                          upsertLearningMutation.mutate({ supplierName: invoice.supplierName, fieldName: 'ventilationComptable', originalValue: invoice.ventilationComptable || undefined, correctedValue: newVentil || '' });
+                                        }
+                                        updateFieldMutation.mutate({ id: invoice.id, data: { ventilationComptable: newVentil, autoFilledFields: updatedAutoFields.length > 0 ? JSON.stringify(updatedAutoFields) : null } });
+                                      }
+                                    }}
+                                    className={`flex-1 px-2 py-1 border rounded text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 ${getFieldColor(invoice, "ventilationComptable")}`}
+                                  >
+                                    <option value="">-</option>
+                                    {allocations?.map((alloc) => (<option key={alloc.id} value={alloc.name}>{alloc.name}</option>))}
+                                    <option value="__ADD_NEW__" className="font-semibold text-blue-600">➜ Ajouter...</option>
+                                  </select>
+                                </div>
+                              </div>
+                            </TableCell>
+                          </TableRow>
+                        )}
+                        </React.Fragment>
                       );
                     })}
                   </TableBody>